# US 12,000,981 B2 · Camera optical lens

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- Number: US 12,000,981 B2
- Document ID: US12000981B2
- Status: Granted
- Kind: B2
- Application number: 17/137,432
- Filed: 2020-12-30
- Published: 2022-05-05
- Granted: 2024-06-04
- Earliest claimed: 2020-11-02
- Assignees: Raytech Optical (Changzhou) Co., Ltd.
- Applicants: Raytech Optical (Changzhou) Co., Ltd
- Inventors: Wen Sun
- Web page: https://patentgrep.com/patent/US12000981B2

## CPC

- G02B 13/0045: {having five or more lenses}
- G02B 9/64: having more than six components
- G02B 27/0025: {for optical correction, e.g. distorsion, aberration}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

The present disclosure provides a camera optical lens including eight lenses which are, from an object side to an image side in sequence: a first lens having a positive refractive power; a second lens having a positive refractive power; a third lens having a positive refractive power; a fourth lens having a negative refractive power; a fifth lens having a negative refractive power; a sixth lens having a positive refractive power; a seventh lens having a negative refractive power; and an eight lens having a negative refractive power; wherein the camera optical lens satisfies conditions of: 0.95≤f/TTL; 3.00≤f2/f≤4.50; and 0.20≤(R5+R6)/(R5−R6)≤0.90. The camera optical lens can achieve good optical performance while meeting the design requirements for large aperture, long focal length and ultra-thinness.

## Claims

### Claim 1

A camera optical lens comprising eight lenses which are, from an object side to an image side in sequence:
a first lens having a positive refractive power;
a second lens having a positive refractive power;
a third lens having a positive refractive power;
a fourth lens having a negative refractive power;
a fifth lens having a negative refractive power;
a sixth lens having a positive refractive power;
a seventh lens having a negative refractive power; and
an eighth lens having a negative refractive power;
wherein the camera optical lens satisfies conditions of:
0.95=f/TTL;
3.00≤f2/f≤4.50;
1.90≤d5/d4≤3.00, and
0.20≤(R5+R6)/(R5−R6)≤0.90;
where
TTL denotes a total optical length from an object-side surface of the first lens to an image surface of the camera optical lens along an optical axis;
f denotes a focal length of the camera optical lens;
f2 denotes a focal length of the second lens;
R5 denotes a central curvature radius of an object-side surface of the third lens;
R6 denotes a central curvature radius of an image-side surface of the third lens;
d4 denotes an on-axis distance from an image-side surface of the second lens to the object-side surface of the third lens; and
d5 denotes an on-axis thickness of the third lens.

### Claim 2 (depends on 1)

The camera optical lens according to claim 1, wherein the camera optical lens further satisfies conditions of:
0.47≤f1/f≤2.00;
−8.45≤(R1+R2)/(R1−R2)≤−1.60; and
0.06≤d1/TTL≤0.25;
where
f1 denotes a focal length of the first lens;
R1 denotes a central curvature radius of the object-side surface of the first lens;
R2 denotes a central curvature radius of an image-side surface of the first lens; and
d1 denotes an on-axis thickness of the first lens.

### Claim 3 (depends on 1)

The camera optical lens according to claim 1, wherein the camera optical lens further satisfies conditions of:
−86.93≤(R3+R4)/(R3−R4)≤−12.39; and
0.02≤d3/TTL≤0.06;
where
R3 denotes a central curvature radius of an object-side surface of the second lens;
R4 denotes a central curvature radius of an image-side surface of the second lens; and
d3 denotes an on-axis thickness of the second lens.

### Claim 4 (depends on 1)

The camera optical lens according to claim 1, wherein the camera optical lens further satisfies conditions of:
0.45≤f3/f≤1.98; and
0.04≤d5/TTL≤0.19;
where
f3 denotes a focal length of the third lens.

### Claim 5 (depends on 1)

The camera optical lens according to claim 1, wherein the camera optical lens further satisfies conditions of:
−2.85≤f4/f≤−0.57;
0.64≤(R7+R8)/(R7−R8)≤3.97; and
0.02≤d7/TTL≤0.05;
where
f4 denotes a focal length of the fourth lens;
R7 denotes a central curvature radius of an object-side surface of the fourth lens;
R8 denotes a central curvature radius of an image-side surface of the fourth lens; and
d7 denotes an on-axis thickness of the fourth lens.

### Claim 6 (depends on 1)

The camera optical lens according to claim 1, wherein the camera optical lens further satisfies conditions of:
−11.19≤f5/f≤1.94;
−7.18≤(R9+R10)/(R9−R10)≤−0.31; and
0.02≤d9/TTL≤0.06;
where
f5 denotes a focal length of the fifth lens;
R9 denotes a central curvature radius of an object-side surface of the fifth lens;
R10 denotes a central curvature radius of an image-side surface of the fifth lens; and
d9 denotes an on-axis thickness of the fifth lens.

### Claim 7 (depends on 1)

The camera optical lens according to claim 1, wherein the camera optical lens further satisfies conditions of:
0.77≤f6/f≤2.78;
1.98(R11+R12)/(R11−R12)≤9.59; and
0.03≤d11/TTL≤0.10;
where
f6 denotes a focal length of the sixth lens;
R11 denotes a central curvature radius of an object-side surface of the sixth lens;
R12 denotes a central curvature radius of an image-side surface of the sixth lens; and
d11 denotes an on-axis thickness of the sixth lens.

### Claim 8 (depends on 1)

The camera optical lens according to claim 1, wherein the camera optical lens further satisfies conditions of:
−3.65≤f7/f≤−0.82;
0.54(R13+R14)/(R13−R14)≤1.94; and
0.03≤d13/TTL≤0.08;
where
f7 denotes a focal length of the seventh lens;
R13 denotes a central curvature radius of an object-side surface of the seventh lens;
R14 denotes a central curvature radius of an image-side surface of the seventh lens; and
d13 denotes an on-axis thickness of the seventh lens.

### Claim 9 (depends on 1)

The camera optical lens according to claim 1, wherein the camera optical lens further satisfies conditions of:
−3.55≤f8/f≤1.03;
−1.70≤(R15+R16)/(R15−R16)≤1.53; and
0.03≤d15/TTL≤0.09;
where
f8 denotes a focal length of the eighth lens;
R15 denotes a central curvature radius of an object-side surface of the eighth lens;
R16 denotes a central curvature radius of an image-side surface of the eighth lens; and
d15 denotes an on-axis thickness of the eighth lens.